def check_mark(mark: int) -> str:
    if mark < 4:
        return 'Незачет'
    return 'Зачет'
        
assert check_mark(1) == "Незачет"
assert check_mark(2) == "Незачет"
assert check_mark(3) == "Незачет"
assert check_mark(4) == "Зачет"
assert check_mark(5) == "Зачет"